UPSD323X datasheet(80/176 Pages) STMICROELECTRONICS

80 / 176 page

µPSD323X

80/176

Address Register (SxADR: S1ADR, S2ADR)

This 8-bit register may be loaded with the 7-bit

slave address to which the controller will respond

when programmed as a slave receive/transmitter.

The Start/Stop Hold Time Detection and System

Clock registers (Tables 57 and 58) are included in

the I2C unit to specify the start/stop detection time

to work with the large range of MCU frequency val-

ues supported. For example, with a system clock

of 40MHz.

Table 56. Address Register (SxADR)

Note: 1. SLA6 to SLA0: Own slave address.

Table 57. Start /Stop Hold Time Detection Register (S1SETUP, S2SETUP)

Table 58. System Cock of 40MHz

Table 59. System Clock Setup Examples

76543210

SLA6

SLA5

SLA4

SLA3

SLA2

SLA1

SLA0

—

Address

Reset Value

Note

SFR

D1h

S1SETUP

00h

To control the start/stop hold time detection for the DDC module

in Slave Mode

D2h

S2SETUP

00h

To control the start/stop hold time detection for the multi-master

I C module in Slave Mode

S1SETUP,

S2SETUP Register

Value

Number of Sample

Clock (fOSC/2 ->

50ns)

Required Start/

Stop Hold Time

Note

00h

1EA

50ns

When Bit 7 (enable bit) = 0, the number of

sample clock is 1EA (ignore Bit 6 to Bit 0)

80h

1EA

50ns

81h

2EA

100ns

82h

3EA

150ns

...

8Bh

12EA

600ns

Fast Mode I C Start/Stop hold time specification

...

FFh

128EA

6000ns

System Clock

S1SETUP,

S2SETUP Register

Value

Number of Sample

Clock

Required Start/Stop Hold Time

40MHz (fOSC/2 -> 50ns)

8Bh

12 EA

600ns

30MHz (fOSC/2 -> 66.6ns)

89h

9 EA

600ns

20MHz (fOSC/2 -> 100ns)

86h

6 EA

600ns

8MHz (fOSC/2 -> 250ns)

83h

3 EA

750ns

UPSD323X 데이터시트(PDF) 80 Page - STMicroelectronics

UPSD323X 데이터시트(HTML) 80 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

데이터시트 다운로드

링크 URL